【作者】 卢奭瑄；

【导师】 夏加宽；

【作者基本信息】 沈阳工业大学 ， 电机与电器， 2007， 硕士

【摘要】 电力系统是一个生产设备及生产部门多，且分散在相距甚远的广阔地区的大型工业生产系统。2002年实行厂、网分开，进一步增加了电力系统管理的复杂性。为了保证系统的正常工作，构成系统的各部分必须在统一的电力调度综合自动化系统协调下工作。为了使调度工作既满足实时性好，又保证可靠性高，必须有一个非常先进的、高度综合的自动化系统。近年来，随着计算机技术、数字通讯、网络技术及卫星定位技术的飞速发展，特别是我国电力系统内网的建设和发展，传统的电力调度自动化系统正向着网络化的方向演变。传统的远动系统正逐步被集网络通信、控制、测量和保护信号于一体的网络化远动系统所代替。本文介绍了最基层单位的变电站在远动技术、网络技术和嵌入式技术方面的最新发展，结合长白公司的电力设备远程监控系统对新的网络化远动终端发展趋势进行了研究。通过对国内外目前最新的变电站综合自动化方案的比较，确定了本课题的研究方向，即采用QNX嵌入式技术和现场总线技术相结合的通信控制系统，实现远动终端的网络化。文章首先简要介绍了Ethernet技术、嵌入式技术和CAN总线技术，然后论述了系统硬件的结构和元器件的选择，软件的总体设计思想和具体流程，以及本系统的通信规约和帧结构，从而完整的阐述了网络远动终端的实现。在掌握电力系统大量规约的基础上，结合Ethernet技术和CANopen总线技术，使得研究成果具有较强的实际生产、应用意义。更多还原

【Abstract】 Electric power system is a large-scale system of production with numerous productive equipment and sections, which is scattered and separated vastly in different areas. The separation of factory from web further promotes the complexity of electric power system in 2000. In order to guarantee the regular work of the system, all the component parts should work under a coordinated electric transfer automated system. An advanced and highly comprehensive automated system is required to ensure the good effects and high security.With the increasing development of computer technique, digital communication, network technique and satellite location technique, especially the construction and development of our national electric power system in recent years, the traditional electronic automated system is transforming into an online one. The traditional Remote Terminal Unit is gradually substituted by the new one which consists of network service, network control, measurement and guard signal.Through the presentation of the latest development of the elementary electric substation on RTU technique, network technique and embedded type technique, the latest network Remote Terminal Unit is studied in accordance with the electric equipment remote supervisory and controlling system of the ChangBai. Through the contrast between the up-to-date electric substation comprehensive automatic programmes of home and abroad, the programme of this task is determined. That is, the network technique of remote terminal unit will be realized by means of the communication control processor system combined by the QNX embedded technique and the bus technique.In the first place, Ethernet technique, embedded technique and CANbus technique are briefly illustrated in this paper, then the structure of the system hardware, choosing of device, general design conception and concrete procedures of the software as well as the communication protocol and frame structure are brought into discussion. All these help expound the realization of network Remote Terminal Unit. With a good understanding of various protocols in the electric system, combining with Ethernet technique and CANopen bus technique, this paper makes a better contribution to practical production and application.更多还原